code: def melspec_sr(ysr):
      y, sr = ysr
      S = librosa.feature.melspectrogram(y=y, sr=sr)
      return S, sr
  
imports: import pytest
  from contextlib import nullcontext
  import os
  import warnings
  import numpy
  import librosa
  from test_core import srand
label_desc: Use image node_id 6 for calling a global function with example usage: melspec_sr(ysr) and returns: S,  sr